Disinfection of flexible fiberoptic laryngoscopes after in vitro contamination with Staphylococcus aureus and Candida albicans.

OBJECTIVE

To determine the efficacy of various cleaning and disinfective methods in reducing bacterial and fungal load on flexible fiberoptic laryngoscopes (FFLs).

DESIGN

In vitro model.

SUBJECTS: Flexible fiberoptic laryngoscopes contaminated with Staphylococcus aureus and Candida albicans.

INTERVENTIONS: Contamination with S aureus and C albicans was separately induced on FFLs, which were then disinfected with different protocols: 20-, 15-, 10-, and 5-minute soaks in ortho-phthalaldehyde (Cidex OPA; Johnson & Johnson) with or without presoaking in an enzymatic soap solution for 5 minutes; an isolated 5-minute soak in an enzymatic soap solution; a 30-second wipe with antibacterial soap and water; a 30-second wipe with isopropyl alcohol; a 30-second wipe with antibacterial soap, followed by a 30-second scrub with isopropyl alcohol; and a 30-second wipe with germicidal cloth, all accompanied by previous rinsing with 30 seconds of running tap water.

RESULTS

All protocols except the isolated 5-minute soak in enzymatic soap solution were successful in completely disinfecting the FFLs after experimental contamination with S aureus or C albicans.

CONCLUSION

Various different cleaning methods appeared to properly disinfect FFLs after inoculation with S aureus and C albicans in an in vitro model.